Gene Tagging
Gene Tagging - Related Videos
11:26
High-throughput Gene Tagging in Trypanosoma brucei
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Cited by 21 •
2016
Addition of a tag to a protein is a powerful way of gaining insight into its function. Here, we describe a protocol to endogenously tag hundreds of Trypanosoma brucei proteins in parallel such that genome scale tagging is achievable.
07:32
Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans
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2015
Biolistic transformation is a method used to generate stable integration of DNA into the genome of the opportunistic pathogen Cryptococcus neoformans through homologous recombination. We will demonstrate biolistic transformation of a construct, which has the gene encoding acetate kinase fused to the fluorescent tag mCherry into C. neoformans.
10:37
CRISPR/Cas9-mediated Endogenous Fluorescent Tagging of Germline-specific Genes in Caenorhabditis elegans
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2026
A CRISPR/Cas9 microinjection workflow for endogenous fluorescent tagging in the Caenorhabditis elegans germline to obtain homozygous knock-in lines for in vivo protein localization analysis.
09:03
Identification and Characterization of Metastatic Factors by Gene Transfer into the Novel RIP-Tag; RIP-tva Murine Model
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Cited by 10 •
2017
We present a protocol to demonstrate a novel somatic gene transfer system utilizing RIP-Tag; RIP-tva mouse model to study the function of genes in metastasis. The avian retroviruses are delivered intracardiacally to ensure gene transfer into pre-malignant, noninvasive lesions of pancreatic β cells in adult mice.
07:23
One-step CRISPR-based Strategy for Endogenous Gene Tagging in Drosophila melanogaster
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Cited by 2 •
2024
Here, we present a simplified endogenous gene tagging protocol for Drosophila, which utilizes a PCR-based technique for marker-free identification of successful genetic modifications, facilitating the development of stable knock-in lines.
FAQs
Placement within a defined genomic site helps connect the tag to the gene’s existing regulatory context. This matters because the experimental goal is usually to observe the gene or protein without disrupting normal regulation or activity. Researchers therefore interpret a signal most confidently when tagging preserves the behavior being measured, rather than creating an artificial expression pattern.
Fluorescent-protein tags and short peptide epitopes support different readouts. A fluorescent tag can be followed through fluorescence microscopy, whereas an epitope provides a recognizable target for immunodetection or biochemical assays. The choice therefore depends on whether the study emphasizes direct visualization, molecular detection, or measurement of a tagged product in an assay.
Gene tagging can reveal more than whether a gene is present. Tracking the tagged product helps researchers examine where a protein localizes, how gene expression appears in cells, and whether the product participates in molecular interactions. Observing these features alongside cell behavior helps connect a genetic change or pattern of expression with its molecular and cellular consequences.
CRISPR-based genome editing is useful when a tag must be introduced at a defined genomic site. Site-directed insertion provides a way to associate the detectable sequence with a particular gene rather than placing it without positional control. This precision supports experiments that compare the tagged gene’s expression or protein behavior with its expected genetic context.
A basic workflow begins by selecting the gene and the type of tag, then introducing the sequence at the intended genomic location. After tagging, researchers monitor the gene or protein using fluorescence microscopy, immunodetection, or biochemical assays. They then evaluate signals in relation to expression, localization, interactions, or cell behavior while considering whether normal activity remains preserved.
In genetics, the technique helps bridge information at the DNA level with observable molecular and cellular outcomes. A tagged gene can be followed through its expression, while a tagged protein can be examined for localization or interactions. These measurements make gene tagging useful for investigating how genetic information is reflected in protein behavior and cell-level responses.